Gas compressor



June 19, 1928.

s. lMHoFF-PAPAKOVA 'GAS COMPRESSOR Filed April' 1-1, 1927 Famed me 191928 1 l 'y Lancia UNITE@ '.S'Tiat ATENT STEPHAivin IMHoFr-PArKovA, oFlBAsnL, swrrznnLAND. l l i y GAS COMPRESSOR.

Application lcd April 11, 1927, Serial No. 182,819, and in Switzerland April 23, 1926 The object of the present invention is a ports 12 are provided on opposite sides of high speed valveless balanced piston comthe partitions 6, 7.; presser, in which each of two oppositely Assuming that the pistons 15 are at the moving pistons is provided with two coninner dead point (Figures 3 and 4) and that- 5 ducting channels relatively displaced both the compressor is in use for compressing air, circumferentially and axially, the outlets of When the crank sha'lt'20 is rotated, for which at the piston circumference are aXiwhich purpose a motor is assumed coupled ally at a distance equal to the piston stroke to it, the pistons will move towards the and of which one communicates with the outer dead points and a reduction of pres- 60 10 cylinder space over the piston and the other sure is produced in the,` space 26, while a with the cylinder space under the piston,vthe rise in pressure Lakes place in the spaces whole arrangement being such that in the 27. Shortly before the outer dead point is outer dead point position, the one piston reached. owing` to the reduced pressure, a channel permits the compressed gas in the fresh charge flows into the space 26 out of 05 l5 outer cylinder space to flow out through apthe suction space 4 through the cylinder propriate corresponding ports, and in the ports 12 and piston ports 17 (Figures 1 inner dead point position the other piston and 2).y At the same instant the air com- Channel permifsth@ compressed gas in the pressed in the space 27 passes through the inner cylinder space to flow out through conducting channels 28 in each piston, 'Y0v appropriate Cylinder ports, through the piston ports 18 and the cylinder l The yaccompanying drawing illustrates by ports 13 into the pressure space 5 and from way of example one embodiment of the inthence to the place of use.

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vention. The pistons 15 now commence to return Figure 1 is a longitudinal section in the towards the inner dead point; a reduction 75 o uter dead point position of the pistons. of pressure then takes place in the cylinder Figure 2 is a longitudinal section taken at spaces 27, while the fresh charge enclosed right angles to Figure 1. ,in the space 26 is compressed. Shortly be- Figure 3 is a longitudinal section in the fore the inner dead point is reached, owing' inner dead point position of the pistons. to the reduction of pressure, fresh air Hows S0 30 Figure 4 is a longitudinal section taken at from the jacket space 4 through the ports right angles to Figure 3. 12, 16 into the spaces 27, while at the same Figures 5 and 6 are cross sections taken on instant the compressed charge in the space the lines V-V and VI-VI of Figure 1 26 passes to the jacket space 5' through respectively. the piston channel 29, the ports 19 and 23, 85

The oppositely moving pistons 15 are reandv from thence to the place of use.

ciprocated in cowaxial cylinders 1, 2, by the With this motion of the pistons there is action of a crank shaft 20. The cylinder practically complete balancing of the masses. jacket 3 is divided into a suction chamber 4 The abovev described compressor has no and a pressure chamber 5 by two diametrivalves. It ensures the highest output with 90 cally opposite partitions 6, 7. Each piston the smallest size.V l

has two conducting channels 28, 29, rela- Vhat l claim iszy tively displaced circumferentially and axi- In a high speed valveless balanced piston ally, their outlets being displaced axially on compressor, the combination of two coaxial the piston circumference by a distance equal cylinders, two oppositely reciprocating 95 to the piston stroke and of which one 28 pistons therein, two sets of ports in each communicates with the cylinder space 27 piston axially spaced apart at a distance over the piston and the other 29 with cylin- Vequal to the piston stroke, two conducting der space 26 under the piston. Further, channels in each piston and relatively diseach piston is provided with inlet ports 16 placed both circumferentially'and axially, 100

and 17, at a. distance apart equal to the said channels having their outlets at the stroke. In the cylinder wall conducting piston circumference axially at a distance apart equal to the piston stroke and communicatng, the one, with the cylinder Space over` the piston and the other with the cyl* 'inder space under the piston, the Whole structure being such that n the outer dead .point position the one piston channel permits the Compressed gas n Jche outer cylinder space to flow out through the correspond-k ing Cylinder ports, and in the inner dead polnt posltlon the other plston Channel permlts the eompl'essed zur 1n the mnel oyhn- `der Space to flow out Vthrough the corre- 

